/* ==========================================================================
   DNS Security & Attack Mechanisms Guide Styles
   Topic: DNS Spoofing, Kaminsky Cache Poisoning & DNS Hijacking
   Supports: Dark & Light Themes
   ========================================================================== */

.dns-article {
  --dns-cyan: #0284c7;
  --dns-blue: #2563eb;
  --dns-red: #e11d48;
  --dns-rose: #f43f5e;
  --dns-green: #059669;
  --dns-emerald: #10b981;
  --dns-amber: #d97706;
  --dns-purple: #7c3aed;
  --dns-panel-bg: color-mix(in srgb, var(--surface-solid, #ffffff) 96%, transparent);
}

html[data-theme="dark"] .dns-article,
:root:not([data-theme="light"]) .dns-article {
  --dns-cyan: #38bdf8;
  --dns-blue: #3b82f6;
  --dns-red: #f43f5e;
  --dns-rose: #fb7185;
  --dns-green: #10b981;
  --dns-emerald: #34d399;
  --dns-amber: #f59e0b;
  --dns-purple: #a855f7;
  --dns-panel-bg: color-mix(in srgb, var(--surface-solid, #0d1b27) 94%, transparent);
}

.dns-article .article-label span,
.dns-article .article-freshness i {
  background: var(--dns-cyan);
  box-shadow: 0 0 16px color-mix(in srgb, var(--dns-cyan) 60%, transparent);
}

/* Resolution Architecture Grid */
.dns-resolution-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.dns-flow-step {
  position: relative;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--dns-panel-bg);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.dns-flow-step:hover {
  transform: translateY(-2px);
  border-color: var(--dns-cyan);
}

.dns-step-num {
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--dns-cyan);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dns-step-num span {
  display: inline-block;
  padding: 2px 8px;
  background: color-mix(in srgb, var(--dns-cyan) 14%, transparent);
  border-radius: 6px;
  color: var(--dns-cyan);
}

.dns-flow-step h3 {
  font-size: 1.05rem;
  margin: 0;
  color: var(--text);
}

.dns-flow-step p {
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--muted-strong);
  margin: 0;
}

/* DNS Packet Anatomy Component */
.dns-packet-view {
  margin: 2rem 0;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  background: var(--surface-solid);
  overflow: hidden;
}

.packet-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1.2rem;
  background: color-mix(in srgb, var(--dns-cyan) 8%, transparent);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  color: var(--dns-cyan);
  font-weight: 700;
}

.packet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1px;
  background: var(--line);
}

.packet-cell {
  padding: 1rem 1.2rem;
  background: var(--surface-solid);
}

.packet-cell-label {
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.packet-cell-val {
  font-family: var(--font-mono, monospace);
  font-size: 0.88rem;
  color: var(--text);
  word-break: break-all;
}

.packet-cell.highlight-red .packet-cell-val {
  color: var(--dns-red);
  font-weight: 700;
}

.packet-cell.highlight-cyan .packet-cell-val {
  color: var(--dns-cyan);
  font-weight: 700;
}

.packet-cell.highlight-green .packet-cell-val {
  color: var(--dns-green);
  font-weight: 700;
}

/* Attack Comparison Matrix */
.attack-matrix-container {
  margin: 2rem 0;
  overflow-x: auto;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  background: var(--dns-panel-bg);
}

.attack-matrix-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  text-align: left;
}

.attack-matrix-table th {
  padding: 1.1rem 1.2rem;
  background: color-mix(in srgb, var(--dns-blue) 12%, transparent);
  color: var(--dns-blue);
  font-family: var(--font-mono, monospace);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line-strong);
}

.attack-matrix-table td {
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted-strong);
  font-size: 0.86rem;
  line-height: 1.6;
  vertical-align: top;
}

.attack-matrix-table tr:last-child td {
  border-bottom: none;
}

.attack-matrix-table td:first-child {
  font-weight: 700;
  color: var(--text);
  font-family: var(--font-mono, monospace);
  font-size: 0.82rem;
}

.badge-vector {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-family: var(--font-mono, monospace);
  font-weight: 700;
}

.badge-spoof {
  background: color-mix(in srgb, var(--dns-cyan) 14%, transparent);
  color: var(--dns-cyan);
  border: 1px solid color-mix(in srgb, var(--dns-cyan) 30%, transparent);
}

.badge-poison {
  background: color-mix(in srgb, var(--dns-red) 14%, transparent);
  color: var(--dns-red);
  border: 1px solid color-mix(in srgb, var(--dns-red) 30%, transparent);
}

.badge-hijack {
  background: color-mix(in srgb, var(--dns-purple) 14%, transparent);
  color: var(--dns-purple);
  border: 1px solid color-mix(in srgb, var(--dns-purple) 30%, transparent);
}

/* Interactive DNS Simulation Lab */
.dns-sim-lab {
  margin: 2.5rem 0;
  border: 1px solid var(--line-strong);
  border-radius: 20px;
  background:
    radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--dns-blue) 12%, transparent) 0%, transparent 70%),
    var(--surface-solid);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.sim-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: color-mix(in srgb, var(--text) 3%, transparent);
  border-bottom: 1px solid var(--line);
}

.sim-header h3 {
  margin: 0;
  font-size: 1.15rem;
  color: var(--text);
}

.sim-header p {
  margin: 0.2rem 0 0;
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  color: var(--muted);
}

.sim-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 30px;
  font-family: var(--font-mono, monospace);
  font-size: 0.76rem;
  font-weight: 700;
  background: color-mix(in srgb, var(--dns-green) 15%, transparent);
  color: var(--dns-green);
  border: 1px solid color-mix(in srgb, var(--dns-green) 30%, transparent);
}

.sim-status-pill.status-poisoned {
  background: color-mix(in srgb, var(--dns-red) 18%, transparent);
  color: var(--dns-red);
  border-color: color-mix(in srgb, var(--dns-red) 40%, transparent);
}

.sim-status-pill.status-sec {
  background: color-mix(in srgb, var(--dns-cyan) 15%, transparent);
  color: var(--dns-cyan);
  border-color: color-mix(in srgb, var(--dns-cyan) 30%, transparent);
}

.sim-canvas-wrap {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-x: auto;
}

.sim-nodes-view {
  width: 100%;
  min-width: 680px;
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.sim-node {
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-raised, var(--surface-solid));
  text-align: center;
  position: relative;
  transition: all 0.3s ease;
}

.sim-node.active-query {
  border-color: var(--dns-cyan);
  box-shadow: 0 0 20px color-mix(in srgb, var(--dns-cyan) 25%, transparent);
}

.sim-node.active-poison {
  border-color: var(--dns-red);
  box-shadow: 0 0 20px color-mix(in srgb, var(--dns-red) 30%, transparent);
}

.sim-node.active-validated {
  border-color: var(--dns-green);
  box-shadow: 0 0 20px color-mix(in srgb, var(--dns-green) 25%, transparent);
}

.sim-node-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 0.75rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  background: color-mix(in srgb, var(--dns-cyan) 12%, transparent);
  color: var(--dns-cyan);
}

.sim-node.poisoned-node .sim-node-icon {
  background: color-mix(in srgb, var(--dns-red) 15%, transparent);
  color: var(--dns-red);
}

.sim-node.resolver-node .sim-node-icon {
  background: color-mix(in srgb, var(--dns-amber) 15%, transparent);
  color: var(--dns-amber);
}

.sim-node h4 {
  margin: 0 0 0.3rem;
  font-size: 0.95rem;
  color: var(--text);
}

.sim-node-detail {
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  color: var(--muted);
}

.sim-cache-box {
  margin-top: 0.8rem;
  padding: 0.5rem;
  background: color-mix(in srgb, var(--bg-deep) 60%, transparent);
  border-radius: 8px;
  border: 1px dashed var(--line);
  font-family: var(--font-mono, monospace);
  font-size: 0.7rem;
  color: var(--muted);
}

.sim-cache-entry {
  color: var(--dns-green);
  font-weight: 700;
}

.sim-cache-entry.entry-poisoned {
  color: var(--dns-red);
}

/* Simulator Controls Panel */
.sim-controls-panel {
  padding: 1.25rem 1.5rem;
  background: color-mix(in srgb, var(--text) 2%, transparent);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.sim-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

.sim-toggle-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  color: var(--text);
  cursor: pointer;
}

.sim-toggle-label input[type="checkbox"] {
  accent-color: var(--dns-cyan);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.sim-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.sim-btn {
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid var(--line-strong);
  background: var(--surface-raised, var(--surface-solid));
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.sim-btn:hover {
  background: color-mix(in srgb, var(--dns-cyan) 15%, var(--surface-raised));
  border-color: var(--dns-cyan);
  color: var(--dns-cyan);
}

.sim-btn.btn-attack {
  background: color-mix(in srgb, var(--dns-red) 12%, transparent);
  border-color: color-mix(in srgb, var(--dns-red) 35%, transparent);
  color: var(--dns-red);
}

.sim-btn.btn-attack:hover {
  background: color-mix(in srgb, var(--dns-red) 22%, transparent);
  border-color: var(--dns-red);
}

/* Event Log Output */
.sim-log-wrap {
  padding: 1rem 1.5rem;
  background: color-mix(in srgb, var(--bg-deep) 90%, black);
  border-top: 1px solid var(--line);
  max-height: 160px;
  overflow-y: auto;
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  line-height: 1.6;
}

.sim-log-entry {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.sim-log-time {
  color: #64748b;
  flex-shrink: 0;
}

.sim-log-text {
  color: #94a3b8;
}

.sim-log-text.log-success { color: var(--dns-emerald); }
.sim-log-text.log-warn { color: var(--dns-amber); }
.sim-log-text.log-danger { color: var(--dns-rose); }
.sim-log-text.log-info { color: var(--dns-cyan); }

/* ==========================================================================
   Kaminsky Exploit Flow Stepper (Fixes Light & Dark Theme Contrast)
   ========================================================================== */
.kaminsky-stepper {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 2rem 0;
}

.kaminsky-card {
  padding: 1.25rem 1.5rem;
  border-radius: 14px;
  background: var(--dns-panel-bg);
  border-left: 5px solid var(--dns-cyan);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.kaminsky-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.kaminsky-card.danger-step {
  border-left-color: var(--dns-red);
}

.kaminsky-card.solution-step {
  border-left-color: var(--dns-green);
}

.kaminsky-card h4 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--text);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.kaminsky-card h4 span {
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem;
  font-weight: 800;
  padding: 3px 8px;
  border-radius: 6px;
  background: color-mix(in srgb, var(--dns-cyan) 15%, transparent);
  color: var(--dns-cyan);
  border: 1px solid color-mix(in srgb, var(--dns-cyan) 30%, transparent);
}

.kaminsky-card.danger-step h4 span {
  background: color-mix(in srgb, var(--dns-red) 15%, transparent);
  color: var(--dns-red);
  border-color: color-mix(in srgb, var(--dns-red) 30%, transparent);
}

.kaminsky-card.solution-step h4 span {
  background: color-mix(in srgb, var(--dns-green) 15%, transparent);
  color: var(--dns-green);
  border-color: color-mix(in srgb, var(--dns-green) 30%, transparent);
}

.kaminsky-card h4 i {
  font-size: 1.15rem;
}

.kaminsky-card.danger-step h4 i {
  color: var(--dns-red);
}

.kaminsky-card.solution-step h4 i {
  color: var(--dns-green);
}

.kaminsky-card p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--muted-strong);
}

.kaminsky-card p code {
  background: color-mix(in srgb, var(--text) 8%, transparent);
  color: var(--text);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.84em;
}

/* Defensive Blueprint Cards */
.defense-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.defense-card {
  padding: 1.4rem;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--dns-panel-bg);
  display: flex;
  flex-direction: column;
}

.defense-card-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  background: color-mix(in srgb, var(--dns-cyan) 14%, transparent);
  color: var(--dns-cyan);
}

.defense-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.08rem;
  color: var(--text);
}

.defense-card p {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--muted-strong);
  flex-grow: 1;
}

.defense-card-rfc {
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--dns-green);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

@media (max-width: 768px) {
  .sim-nodes-view {
    grid-template-columns: 1fr;
    min-width: unset;
  }
  .sim-controls-panel {
    flex-direction: column;
    align-items: flex-start;
  }
  .sim-btn-group {
    width: 100%;
  }
  .sim-btn {
    flex: 1 1 auto;
    justify-content: center;
  }
}